There will never be another US Open quite like the 2015 edition. From the shadow of Serena Williams' pursuit of history, two incredibly worthy winners emerged – Novak Djokovic, the best in the world cementing his place, and Flavia Pennetta, the ...

Flavia Pennetta certainly has a keen sense of timing – and a flair for the dramatic. Moments before the rains came, she wrapped up her first Grand Slam singles title, then promptly announced her retirement during her on-court interview.

Flavia Pennetta climbed the summit Saturday, then she walked away. In doing so, she joined some of the game's greatest and most beloved figures in making the US Open their last career stop. Here's a look at a few of the most memorable.